Recording and computing machine



June 21, 1949. E; F. THIERFELDER 2,473,738

RECORDING AND COMPUTING MACHINE Filed Aug. 10, 1944 s Sheets-Sheet 1 AT: TORNE Y R E D R L 0 E T F N m w I 2 n 6 m m w J H F F L "U M E 0 6 8 2 4 3 3 m 0 I I Y a a m f w 1 a 7 i l lg hq lizmm w m l n L :E w I 5 u. H 4 M I... 7h A 2 F m 8 o 06 I 2 m E. F. THIERF ELDER RECORDING AND COMPUTING MACHINE June 21 1949.

5 Sheet sSheet 2 Filed Aug. 10, 1944 INVENTOR EMIL F. THIERFELDER BY )rfi ATTORNEY June 21, 1949. E. F. THIERFELDER 2,473,738

RECORDING AND CQMPUTING MACHINE Filed Aug. 10, 1944 s Shets-Sheet 3 12 58 2| 3s 3s 34 3a 24 IIIIIIIIIIIIIIIIIAVIII/IIUIlIIlIIIIIIIII/lVIIIIIIIlV/lI/IIII/llV/IA v Whc '1 22 A, Q I 32 H63 IINVENTOR )1 KIM? ATTORNEY EMIL F THIERFELDER Patented June 21, 1949 RECORDING AND COMPUTING MACHINE,

Emil F. Thierfelder, Ilion, N. Y., assignor to Remington Rand Inc., Bufialo, N. Y., a corporation of Delaware Application August 10, 1944, Serial No. 548,909

21 Claims. 1

This invention relates to new and useful im-- provements in computing and recording machines, and has particular reference to improvements in the totalizers used thereon.

A main object of the invention is to provide simple and efficient means in the totalizer itself which, under the control of the numeral wheels thereof, will be able to actuate and control mechanical or electrical devices outside the totalizer to effect any desired operations.

Another object is to provide an improved structure in which the parts employed are fewer, simpler in operation, more economical to manufacture and more reliable in effecting desired results in every day operation.

A more specific object is to provide an improved add-1 mechanism which is substantially built into the totalizer itself.

Further and more specific objects, features, and advantages will more clearly appear from the proper consideration of the annexed drawings which form part of the following specification and which illustrate a present preferred form which the invention may assume.

The totalizer employed is generally of the type shown in U. S. Patent No. 1,270,471, issued June 25, 1.918, to J. C. Wahl and entitled Calculating machine. Other features are novel improvements over the clear signal mechanism shown in U. S. Patent No. 2,083,994, issued June 15, 1937, to F. A. Hart, and entitled Accounting machine.

Briefly and generally, the invention concerns a computing and printing machine, preferably of the Remington type in which there is a frame, a to-and-fro travelling carriage and a totalizer mounted on the carriage and receiving entries as it passes a point on the machine where it becomes associated with the usual actuator mechanism for the addition to or subtraction of amounts from the totalizer.

According to the invention the totalizer has a plurality of wheels set to represent numerical values entered therein and also a plurality of fingers projecting therefrom with means associated with the wheels and connected to the respective fingers to move the fingers from one position to another as the respective wheels move from one position to another position.

More particularly the fingers are moved espe cially when the wheels moveto and from their respective zero positions. When adapted to be used as a device to control the add-1 operation in machines of this type the fingers are associated with a fixed plate on the frame and, when in one position, contact with said plate as the carriage is moved past said plate. When in another position the fingers do not make contact with the plate. The wheels of the totalizer are provided with means whereby when they are in their zero position, the connecting mechanism to the fingers will move the fingers to a position where they will not contact the plate. On the other hand when the wheels are in any position except the zero position, the fingers are disposed so that they do contact the plate. Preferably, in one adaptation of the device the fingersin contacting the plate keep closed a circuit in which is a relay. When all the fingers are out of contact with the plate this circuit is broken and the relay deenergized to effect a circuit contact closure which, for example, may set circuit arrangements to print a tens complement in writing a total. Of course it is clear that this arrangement of parts can be employed to accomplish many other new and useful results than the particular one set forth here and hereinafter.

Still more particularly it is also provided with means whereby when all the fingers are in a predetermined position a clear signal element is permitted to move to a position whereby a clear signal or symbol can be printed at the proper time.

Means are also provided whereby, when the actuator is about to enter items into the totalizer, and the wheels thereof must be moved, the connection between the wheels and the finger operating means is temporarily released to permit the wheels to move freely during their rotation.

In the accompanying drawings, wherein like reference characters designate corresponding parts in the different views- Fig. 1 is a top plan view, with certain parts removed, of the improved totalizer;

Fig. 2 is a front view of the totalizer, with parts removed, and showing its cooperation with the plate on the frame;

Fig. 3 is a general vertical cross sectional view through the totalizer and the frame of the machine, with parts omitted for clarity, taken at the right end of the totalizer shown in Fig. 2 with the casing thereof removed;

Fig. 4 is a somewhat diagrammatic partial view of certain parts removed from the machine and showing the parts in position when the numeral wheel is at zero position;

Fig. 5 ma partial perspective view of certain of the elements; and,

Fig. 6 is a similar view of certain other elements.

In the operation of this invention, which can be applied to any totalizer, it is preferably shown as applied to a cross" totalizer, of a Remington automatic total writing bookkeeper. In the drawings, the totalizer is provided with suitable frame plates I and and a cover plate l2, beneath and between which the various operating parts are suitably housed and supported.

With special reference to Fig. 3, wherein some parts have been omitted for purposes of achieving clarity of understanding as to the operation of the invention, the side'plates of the totalizer have been provided with theusual dovetail members l3 to permit it to be attached to the carriage if it is a vertical totalizer or to a truck (not shown) in a manner similar to that inwhich the totalizer 13 is attached to truck M as shown in Fig. 2 of the above mentioned Hart patent in which, as in the instant case, the said totaliz'er 13 is a cross totalizer and is not mounted directly on the carriage.

There is provided a series of number wheels l4 having pinions I5 fixed thereto and movable therewith. Each pinion is provided with a shortened tooth l6, and withcteeth ll of regular dimensions. A. sensingelement I8 is provided to contact with thepinion ofeachnumber wheel and is adapted to rest against the teeth of the pinion. Each sensing element I8 is pivoted at H! and has an upward'extension pivotally connected by a link 2| to the'lower arm 22 of a bell crank lever of which the' other upstanding arm 23 thereof projects out of the casing of the totalizer as a finger. Thisbell crank is pivoted at 24. For each numeral wheel there is provided an independent combination of elements includ ing the comb element |8,'arm 20, link 2|, and bell crank lever 22-'-23 When the wheel I4 is in a position representing -'a digit other than zero the regular teeth on it will cause the above lever system to assumethe position'shown in Fig. 3 in which case the fingers 23 will project substantially straight up.

As is illustrated in the U. S. patent to Roggenstein No. 2,412,537, issued December 10, 1946,

when a cross totalizer is moved with the carriage past a predetermined position to Write a total automatically, when the last digit other than zero in the total is presented to the sensing fingers an add-1 mechanism is operated to set up circuits or achieve certain; desirable connections whereby the said last digit may be printed as a tens complement as is customary when the total being printed is a negative total; In accordance with one use to which the present invention may be applied, the totalizer shown herein is shown as a cross totalizer and the mechanism just above described may be used as an add-1 mechanism.

In order to achieve this result, the fingers 23 r when disposed in one position, preferably that in which they are placed by the presence in the totalizer of digits-other than zero, are adapted to rub against the'lowersurface of a contact plate 25, during-the movement of the fingers through a certain predetermined portion of the travel of the totalizer of which'they are a part. The plate is of metal adapted to form part of an electric circuit and is resiliently supported by spring 26 (see'Fig. 2) within a groove 21 in a supporting block 28. Thisblock is insulatingly supported by means of insulating plates 29 in any suitable manner from a portion 30 of the fixed frame of the machine.

According to the disclosure in the Roggenstein patent above, when the last digit other than zero in a negative total is about to be printed an add-1 plate causes the add-1 '(relay R-8) circult to be broken andthus establish through the release of this relay'a circuit which energizes the tens complement relay R-5. In the instant invention the contact plate 25 is so disposed on the frame member 30 that when the finger 23, connected to the last digit wheel other than zero in a negative total, passes off the plate just before that figure is to be printed, the circuit of which the finger and the plate form a part is thus broken and a relay 3| corresponding to the relay R.8 in the above application is deenergized to close a contact 59 (R5 of relay R8 in the above application) whereby a tens complement circuit is made up as fully described in the above application. Only so much of the circuit is shown in Fig. 4 as is necessary to understand the present invention. in connection with the tens complement circuit disclosed in the above application. t is of course obvious that the contact between the fingers 23 and the plate 25 can be used to control many other circuits and even be employed to achieve mechanical movements if desired.

When any number wheel l4 stands at zero its sensing element l8 will rest on the shortened tooth It thereof and this will permit the element to move down further and thus operate the linkage to swing the finger connected thereto to a position shown in Fig. 4 wherein it will not contact with the plate 25 when the totalizer is moved past the plate 25. In Figs. 2 and 4 it is schematically clear that the totalizer, the fingers, the plate 25 and the relay 3| are part of a circuit which is closed whenever there is at least one finger in contact with the plate 25 but that this circuit is broken when the last upright finger passes beyond the plate to the position where the digit related to it is to be printed.

It will be understood, upon reference to Fig. 3, that the fingers 23 are in contact with the contact plate 25 to thereby establish the control circuit whereby the add-1 circuit is open when none of the numeral wheels are at their zero position. On the other hand, when all of the fingers 23 are out of contact with the plate 25, the control circuit is open to thereby close the add-l circuit. In the mechanism as above described, the finger 23 of Fig. 3 is eilective to close the control circuit and ineffective to close the add-l circuit. Similarly, as seen in Fig. 4, the finger 23 is shown ineffective to close the control circuit, but eifective to close the add-1 circuit.

When all the numeral wheels are set at zero and thus indicate that the totalizer is clear, the invention herein provides means settable under these conditions to permit a clear symbol to be printed. In Fig. 3 there is a universal bail element 32 pivotally supported by shaft 33 extending between the side plates H) and H of the totalizer. This bail has spaced slots through which the rear portions of the links 2| extend. Each said link 2| has thereon a laterally projecting stud 34 disposed thereon in front of the bail 32 and when the link 2| is moved rearwardly the stud swings the bail counterclockwise. Each link is connected to one end of a spring 35 the other end of which is attached to some fixed member such as 36 in the machine and this spring tends to keep the link in a forward position and thus tends to press the sensing element H! on the teeth of the pinion l5. As shown in Fig. 3 the element |8.is resting on one of the regular teeth of the numeral'wheel pinion and consequently the link 2| is rearward and the finger 23 connected thereto is in the raised or upright position to contact the plate 25 when the totalizer moves past said plate. Since the bail 32 is contacted by the lugs 34 on all the links 2| it isobvious that as long as one link is in rearward position, indicating a numeral other than zero in at least one numeral wheel, the bail will be maintained in the position shown in this figure.

At its right end the bail is itself provided with a stud 31 which is adapted to bear against the upper end of an arm 38 of a bell crank lever pivoted at 38 the other arm in of which is forked at 4|. This forked portion receives the end of an arm 42 rotatable on shaft 43 and forming part of a quadrant member 44 having teeth engaging teeth on a sensing disk or gear 45 rotatable on shaft 46 and having a sensing tooth 41. It is clear that when the upper end of arm 38 is pushed back by the stud on the bail 32 the tooth 41 will be moved in to one position, Whereas when the bail is allowed to swing clockwise as the link 2| moves forwardly, a spring 48, fastened at one end to the arm 38 and at the other end to a fixed member 49 in the machine, will cause the movement of the tooth 41 to another position. Therefore it is to be noted that, when the sensing elements l8 are all resting on the low teeth of the pinions of the numeral wheels l4, the bail is allowed to move back to normal, the arm 38 is allowed to move forward, and the finger 41 is permitted to move to a position where it will engage a sensing finger (not shown) to print a clear symbol in a manner similar to the sensing of the teeth by sensing fingers in the above mentioned Roggenstein patent.

In order to permit free and unimpeded rotation of the numeral wheels when necessary such as during clearing or item entry, I have provided a novel means to achieve this result. This means is associated with a well known master dog such as 50 of the type shown clearly in the patents above mentioned. During item entry when the wheels have to be turned, this dog is operated by the actuator mechanism shown in these patents to lock the truck in position on which the totalizer is mounted and also operates a lever 51 the lower end of which engages the dog 50 when it is operated. This lever is pivoted at 39 and has an upper portion 52 provided with a rounded projection 53 adapted, when the lever is raised by the dog 50, to engage and swing a usual stop bail 54. This type of bail is shown in the patents supra, but in accordance with this invention is provided with an extra extension bail portion 55 having a dependent hook portion normally lying above and out of contact with rearwardly extending lips such as 51 on each sensing element arm 20. This bail 55 extends across the machine and is pivotally supported at 58. When the dog 50 is operated this bail is moved counter-clockwise as shown in Figure 3 and very slightly lifts the elements l8 from pressure contact with the teeth of the pinions [5 so that the wheels may be free to be turned whenever that is desired. Since the dogs are only operated temporarily the sensing elements are restored to normal position before the totalizer is allowed to move to the next position. This latter device is therefore means actuated during item entry or the rotation of the numeral Wheels to free them momentarily from the retarding effect of the sensing element pressure.

While I have described what I consider to be highly desirable embodiments of my invention, it is obvious that many changes in form could be made without departing from the spirit of my invention, and I, therefore, do not limit myself to the exact form herein shown and described,

nor to anything less than the whole of my invention as hereinbefore set forth, and as hereinafter claimed.

What I claim as new and desire to secure by Letters Patent is:

1. In a machine of the class described, a normally open add-1 circuit, a totalizer having a plurality of numeral wheels, a sensing element respectively associated with each of said numeral wheels, means on the wheels to cause the movement of said sensing elements as the wheels move to and from a predetermined position, means including a movable finger associated with each of said sensing elements and adapted when effective to close said circuit, and means connecting each finger with its respective sensing element whereby the movement of the numeral wheels will move said fingers relatively to efiective positions.

2. In a machine of the class described, a normally open add-1 circuit, a totalizer having a plurality of numeral wheels, a sensing element respectively associated with each of said numeral wheels, means including a movable finger associated with each of said sensing elements and adapted when efiective to close said circuit, and means associated with the sensing elements and connected to the respective fingers to move the fingers relatively from effective to inefiective position as the respective wheels move to and from a predetermined position.

3. In a machine of the class described, a normally open add-l circuit, a totalizer having a plurality of numeral wheels, a sensing element respectively associated with each of said numeral wheels, means including a movable finger associated with each of said sensing elements and adapted when efiective to close said circuit, and means associated with the sensing elements and connected to the respective fingers to move the fingers relatively from efiective to ineffective position as the respective wheels move to and from the Zero position thereof.

4. In a machine of the class described, a normally open add-1 circuit, a totalizer having a plurality of numeral wheels, a sensing element respectively associated With each of said numeral wheels, means including a movable finger associated with each of said sensing elements and adapted when efiective to close said circuit, means on the wheels to cause the movement of said sensing elements as the wheels move to and from the zero position thereof, means connecting each finger with its respective sensing element whereby the movement of the numeral wheels will move said fingers to effective positions, and a contact plate for cooperation with said totalizer, the contact plate being adapted to be contacted by said fingers of the totalizer.

5. In a machine of the class described, having a normally open add-l circuit, a totalizer having plurality of numeral wheels, means including a finger projecting from the totalizer for each numeral wheel and adapted when in effective position relative to said add-l circuit to close said add-1 circuit, connections between the wheels and their respective fingers, and means on the wheels and operatively associated with said connections to position the respective fingers in said effective position when the respective wheels are at zero position and to position the respective fingers in ineifective position relative to said add- 1 circuit when the respective wheels are in any other position.

6. In a computing and printing machine having, a frame, a to and fro travelling carriage, and a totalizer mounted on said carriage, the combination of an add-1 circuit, an add-1 relay, a contact plate, a control circuit connected through said contact plate for energizing and deenergizing said add-1 relay to open and close said add-1 circuit, a plurality of numeral wheels, a plurality of sensing elements respectively associated with the wheels, means on the wheels to cause the movement of said sensing elements as the wheels move to and from a predetermined position, a lurality of fingers projecting from the totalizer, means connecting each finger with a sensing element whereby the movement of the sensing elements will move the fingers from efiective to ineffective positions, said fingers adapted to contact with said plate to close said control circuit when disposed in their effective positions relative to said control circuit and to be out of contact to open said circuit when disposed in their ineffective position relative to said control circuit whereby said add-l circuit is opened and closed respectively.

7. In a computing and printing machine having a frame, a to-and-fro travelling carriage, a

contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing said add-1 circuit, a plurality of numeral wheels on said to-talizer, a plurality of fingers projecting from said totalizer, means under control of said wheels and connected to the respective fingers to move the fingers from one position to another as the respective wheels move to and from a predetermined position, the fingers of the totalizer adapted to contact with said contact plate to close said control circuit when disposed in one position and to be out of contact therewith to open said control circuit when in another position whereby said add-1 circuit is opened and closed respectively.

8. In a computing and printing machine having a frame, a to-and-fro travelling carriage, a

contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing the add-1 circuit, a plurality of numeral wheels on said totalizer, a plurality of fingers projecting from said totalizer, means under control of said wheels and connected to the re spective fingers to move the fingers from effective to ineffective position as the respective wheels move to and from their zero position thereof, the fingers of the totalizer adapted to contact with said contact plate to close said control circuit when disposed in one position and to be out of contact therewith to open said control circuit when in another position as the totalizer is moved past said plate.

9. In a computing and printin machine having a frame, a to-and-fro travelling carriage, a contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing the add-'1 circuit, a plurality of numeral wheels on said totalizer, a plurality of sensing elements respectively associated with the wheels, means on the wheels to cause the movement of the sensing element of each wheel as it moves to and from the zero position thereof, a plurality of fingers projecting from the totalizer, means connecting each finger with a sensing element whereby the movement of the sensing element will move the respective finger from one position to another, the fingers of the totalizer adapted to contact with said contact plate to close said control circuit when disposed in one position and to be out of contact therewith to open the control circuit when in another position as the totalizer is moved past said plate.

10. In a computing and printing machine having a frame, a to-and-fro travelling carriage, a contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing said add-1 circuit, a finger projecting from the totalizer for each numeral wheel, connections between the wheels and their respective fingers, means on the wheels and operatively associated with said connections to position the respective fingers in one position when the respective wheels are at zero position and to position the respective fingers in another position when the respective wheels are in any other position, the fingers of the totalizer adapted to contact with said contact plate to close said control circuit when disposed-in said one position and to be out of contact therewith and to open said circuit when in said other position as the totalizer is moved past said plate.

11. In a computing and printing machine having a frame, a to and fro travelling carriage, a contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing' said add-1 circuit, a plurality of numeral wheels, a plurality of sensing elements respectively associated with said wheels, means on the wheels to cause the movement of the sensing element of each as the wheels move to and from a predetermined position, a plurality of movable fingers projecting from the totalizer and adapted when in effective position relative to said control circuit to close said control circuit, means connecting each finger with a sensing element whereby the movement of the sensing elements will move the fingers from effective to ineffective positions, a clear signal control device movable to operative and inoperative positions, and means associated with said clear signal control device and under control of said connecting means to hold the control device in inoperative position whenever any one or more numeral wheels is in any position except the zero position.

12. In a computing and printing machine having a frame, a to and fro travelling carriage, a contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing the add-1 circuit, a plurality of movable fingers projecting from the totalizer and adapted when in efiective position relative to said control circuit to close said control circuit, means associated with the wheels and connected to the respective fingers to move the fingers from ineffective to effective position as the respective wheels move to and from a predetermined position, a clear signal control device movable to operative and inoperative positions, and means associated with said clear signal control device and under control of said connecting means to hold the clear signal control device in inoperative position whenever any one or more numeral wheels is in any position except the zero position.

13. In a computing and printing machine having a frame, a to and fro travelling carriage, a contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing the add-1 circuit, a plurality of movable fingers projecting from the totalizer and adapted when in effective position relative to said control circuit to close said control circuit, means associated with the wheels and connected to the respective fingers to move the fingers from efi'ective to ineffective position and vice versa as the respective wheel's move to and from. their zero position, a clear signal control device movable to operative and inoperative positions, and means associated with said clear signal control device and under control of said connecting means to hold the clear signal control device in inoperative position whenever any one or more numeral wheels is in any position except the zero position.

14. In a computing and printing machine having a frame, a to and fro travelling carriage, a contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing the add-1 circuit, a plurality of movable fingers projecting from the totalizer and adapted when in effective position relative to said control circuit to close said control circuit, a plurality of numeral Wheels on said totalizer, a plurality of sensing elements respectively associated with said wheels, means on the wheels to cause the movement of the sensin element of each as the wheels move to and from their zero position, means connecting each finger with a sensing element whereby the movement of the sensing elements will move the fingers from one position to another, a clear signal control device movable to operative and inoperative positions, and means associated with said clear signa1 device and under control of said connecting means to hold the control device in inoperative position whenever any one or more numeral wheels is in any position except the zero position.

15. In a machine of the class described, an add-1 circuit, a control circuit for opening and closing said add-1 circuit, a totalizer having a plurality of numeral wheel-s, means including a finger projecting from the totalizer for each numeral wheel and adapted when in eifective position relative to said control circuit to close said control circuit, connections between the Wheels and their respective fingers, and means on the wheels and operatively associated with said connections to position the respective fingers in their ineffective position when the respective wheels are at zero position and to position the respective fingers in their effective position when the respective wheels are in any other position, a clear signal control device movable to operative and inoperative positions, and means associated with said clear signal control device and under control of said connectin means to hold the clear signal control device in inoperative position whenever any one or more numeral wheels is in any position except the zero position.

16. In a machine of the class described, an add-l circuit, a control circuit for opening and closing said add-l circuit, a totalizer having a plurality of numeral wheels, a plurality of sensing elements respectively associated with said wheels, means on the wheels to cause the movement of the element of each as the wheels move 10 to and from a predetermined position, a plurality of fingers projecting from the totalizer and adapted when in effective position relative to said control circuit to close said control circuit, means connecting each finger with a sensing element whereby the movement of the sensing elements will move the fingers from efiective to inefiective position, a clear signal device control movable to operative and inoperative positions, and means associated with said clear signal control device and under control of said connecting means to hold the clear signal control device in inoperative position whenever any one or more numeral wheels is in any position except the zero position.

17. In a computing and printing machine having a frame, a to and fro travelling carriage, a contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing the add-1 circuit, a plurality of numeral wheels on said totalizer, a plurality of fingers projecting from said totalizer, means associated with the wheels and connected to the respective fingers to move the fingers from ineffective to effective position as the respective wheels move to and from a predetermined position, said fingers adapted to contact with the plate and close the control circuit when disposed in one position and to be out of contact therewith and to open said control circuit when in another position as the totalizer is moved past said plate, a clear signal control device movable to operative and inoperative positions and means associated with said clear signal control device and under control of said connecting means to hold the clear signal control device in inoperative position whenever any one or more numeral wheels is in any position except the zero position.

18. In a computing and printing machine having a frame, a to and fro travelling carriage, a contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing the add-1 circuit, a plurality of numeral wheels on said totalizer, a plurality of fingers projecting from said totalizer, means associated with the wheels and connected to the respective fingers to move the fingers from efiective to ineffective position as the respective wheels move to and from their zero position thereof, said fingers adapted to contact with the plate and close the control circuit when disposed in one position and to be out of contact therewith and to open said control circuit when in another position as the totalizer is moved past said plate, a clear signal control device movable to operative and inoperative positions, and means associated with said clear signal control device and under control of said connecting means to hold the clear signal control device in inoperative position whenever any one or more numeral wheels is in any position except the zero position.

19. In a computing and printing machine having a frame, a to and fro travelling carriage, a contact plate mounted on said frame and a totalizer mounted on said carriage, the combination of an add-1 circuit, a control circuit connected through said contact plate for opening and closing the add-l circuit, a plurality of numeral wheels on said totalizer, a plurality of sensing elements respectively associated with said wheels, means on the wheels to cause the movement of the sensing element of each wheel as it moves to and from the zero position thereof, a plurality of fingers projecting from the totalizer, means connecting each finger with a sensing element whereby the movement of the sensing element will move the respective fingers from one position to another, said fingers adapted to contact with the plate to close said control circuit when disposed in one position and to be out of contact therewith and to open said control circuit when in another position as the totalizer is moved past said plate, a clear signal control device movable to operative and inoperative positions, and means associated with said clear signal control device and under control of said connecting means to hold the clear signal control device in inoperative position whenever any one or more numeral wheels is in any position except the zero position.

20. In a computing and printing machine having a frame, a to and fro travelling carriage, a contact plate mounted on said plate anda totalizer mounted on said carriage, the combination of an add-1 circuit,a control circuit connected through said contact plate for opening and closing the add-1 circuit, a plurality of numeral wheels on said totalizer, a finger projecting from the totalizer for each numeral wheel, connections between the wheels and their respective fingers, and means on the wheels and operatively associated with said connections to position the respective fingers in their inefiective position relative to said control circuit when the respective wheels are at zero position and to position the respective fingers in effective position relative to said control circuit when the respective wheels are in any other position, said fingers adapted to contact with the plate to close said control circuit when disposed in said effective position and to be out of contact therewith and to open said control circuit when in said ineffective position,

a clear signal control device movable to operative and inoperative positions, and means associated with said clear signal control device and under control of said connecting means to hold the clear signal control device in inoperative position whenever any one or more numeral wheels is in any position except the zero position.

21. In a totalizer having a plurality of numeral wheels with a pinion movable with each wheel, one of the teeth of each pinion being shortened, sensing elements adapted to press against the teeth of the pinions, a link connected to each sensing element, a movable finger connected to each of said links, said finger projecting outwardly from the totalizer,-studs on each link, a bail member having a normal position and adapted to be engaged and moved by any one of said studs when any one of said links are moved, a clear signal control device movable to operative and inoperative positions, and means associated with said clear signal control device and under control of said connecting means to hold the clear signal control device in inoperative position whenever any one or more numeral wheels is in any position except the Zero position.

EMIL F. THIERFELDER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,325,819 Wahl Dec. 23, 1919 1,403,130 Marshall Jan. 10, 1922 1,483,580 Hart Feb. 12, 1924 1,490,098 Felbel Apr. 15, 1924 2,048,568 Seymour July 21, 1936 2,192,365 Pitman Mar. 5, 1940 2,261,242 Fettig Nov. 4, 1941 

